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PPW1

Location: Rockbank

Australian Soil Classification: Vertic (& Calcic), Mesonatric, Red SODOSOL
General Landscape Description: Edge of plain, approximately 1,100 m east of Mt Kororoit summit.

Land Use: Grazing

PPW1-3 Landscape
PPW1-3 Landscape


Soil Profile Morphology:

Surface Soil

A10-12 cmYellowish red (5YR4/6); fine sandy clay loam; moderate coarse to medium blocky structure; weak consistence (wet); few dark flecks of manganese (2-5%); pH 5.7; abrupt change to:
PPW1 profile
PPW1 Profile
Subsoil
B2112-25 cmYellowish red (5YR5/8); light clay; moderate to strong coarse blocky structure; weak consistence (moist); pH 6.6; clear change to:
B2225-50 cmYellowish red (5YR5/6); medium heavy clay; strong coarse blocky, parting to moderate to strong medium polyhedral structure; very firm consistence (moist); very few spots of manganese (0-2%); slickensides present; pH 8.4; gradual change to:
B2350-80 cmYellowish red (5YR4/6); heavy clay; strong coarse blocky, parting to medium polyhedral structure; very firm consistence (slightly moist); very few dark spots manganese (0-2%); slickensides present; roots to 60 cm; roots move along slickensides; pH 9.4; gradual and wavy change to:
B24k80-120 cmLight brown (7.5YR6/4) with dark red (2.5YR4/6) mottles; conspicuously bleached; medium clay; moderate to strong medium polyhedral structure; firm consistence (moist); few soft to semi hard dark spots of manganese (1-2 mm); roots stop at carbonate layer; some lenticular structure in patches; pH 9.5; gradual and wavy change to:
B25k120+ cmBrown (7.5YR5/4) with dark red (2.5YR4/8) mottles; light medium clay; strong coarse blocky, parting to medium polyhedral structure; firm consistence (wet); few soft to semi hard dark spots of manganese (1-2 mm); pH 9.6:

Key Profile Features:



Soil Profile Characteristics:
pH
Salinity Rating
Surface
(A1 horizon)
Moderately Acid
Sodic
Subsoil
(B21 horizon)
Slightly Acid
Strongly Acid
Deeper subsoil
(at 120+ cm)
Very Strongly Alkaline
Strongly Acid
PPW1 graphs
Horizon
Horizon Depth
pH (water)
pH CaCl2
EC
1:5
NaCl
Exchangeable Cations
Ca
Mg
K
Na
Meq/100g
A1
0-12
5.7
4.9
0.10
5.5
3.0
2.4
0.79
B21
12-25
6.6
5.6
0.14
4.3
6.7
1.4
3.1
B22
25-50
8.4
7.8
0.38
0.03
5.5
15
2.6
8.1
B23
50-80
9.4
8.7
0.87
0.09
4.9
19
2.7
12
B24k
80-120
9.5
8.8
1.2
0.15
4.7
16
2.2
12
B25k
120+
9.6
9.2
1.1
0.06
4.6
18
2.1
13

Horizon
Horizon Depth
Ex Al
mg/kg
Ex Ac
meq/100g
Field
pF2.5
g/100g
Wilting Point
pF4.2
g/100g
Coarse Sand
(0.2-2.0mm)
%
Fine Sand
(0.02-0.2mm)
%
Silt
(0.002-0.02mm)
%
Clay
(<0.002mm)
%
A1
0-12
<10
14.8
25.0
6
32
19
34
B21
12-25
21.1
31.1
3
24
12
56
B22
25-50
27.9
47.2
2
17
16
65
B23
50-80
29.8
48.0
3
18
14
60
B24k
80-120
25.4
42.9
3
12
11
52
B25k
120+
CC BY 4.0 AU

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